Re: [thredds] Disabling the cache for file that are routinely overwritten

• To: thredds@xxxxxxxxxxxxxxxx
• Subject: Re: [thredds] Disabling the cache for file that are routinely overwritten
• From: John Caron <caron@xxxxxxxxxxxxxxxx>
• Date: Fri, 20 May 2011 13:09:48 -0600

Hi Rich:

2) What is the use case for this overwriting?

On 5/20/2011 12:48 PM, Rich Signell wrote:

TDS folks,

We have several providers that routinely overwrite files with new
data, for example, overwriting a file called "forecast.nc" with new
data each day.

As I understand it from reading
http://www.unidata.ucar.edu/projects/THREDDS/tech/tds4.2/reference/ThreddsConfigXMLFile.html#NetcdfFileCache
it appears that if we don't want to cache certain datasets, we have two choices:

1) Turn off caching for ALL datasets served by TDS, by modifying the
threddsConfig.xml to read:
<NetcdfFileCache>
     <maxFiles>0</maxFiles>
</NetcdfFileCache>

2) Turn off caching for AN INDIVIDUAL dataset served by TDS, by
setting a<datasetRoot>  with the cache="false"/>  option, and then
specifying each individual dataset.

But if we have a bunch of datasets in a directory that we would like
to turn off caching for, is there a way to turn off caching in
<datasetScan>?
I tried using<datasetRoot with cache="false">  in the specification of
a<datasetScan>  but that didn't seem to work.

I certainly could have missed something.   But if not, it would be
nice to have more ability to control the cache on a dataset-by-dataset
basis in the future.

-Rich

• Follow-Ups:
  • Re: [thredds] Disabling the cache for file that are routinely overwritten
    • From: tom cook

• References:
  • [thredds] Disabling the cache for file that are routinely overwritten
    • From: Rich Signell